I had the same problem as I was answering questions from memory. After I started to refer back to passage, I am seeing improvement.

i noticed the exact same thing. I tatooed in my head to always refer back to the text and never answer on a hunch. Do you have anymore tricks?

Do you think there is any special trick to escape from this problem?

I am very used to doing a long passage with tough questions. THis is where I shine. BUT yesterday I bombed an easier set of questions and short passage. I learned that the short passages ARE a different animal from the long passages. THe long passages are actually easier because they hold almost all info in the beginning of the text. Short passages hold vital information to the main idea in both top and bottom of the passage. This needs to be taken into account when dealing with the questions.. LESSON LEARNED!